[solved] QDeclarativeItem geometry
-
I'm trying to wrap a QWidget-based class for use in QML. I use class derived from QDeclarativeItem and override method geometryChanged in it:
@
class PlotWidget : public QDeclarativeItem
{
Q_OBJECT
public:
PlotWidget(QDeclarativeItem *parent = 0);
protected:
void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
private:
class Impl;
std::auto_ptr<Impl> impl;
};
@Inside the class PlotWidget I have a QwtPlot object (QwtPlot is a QWidget-based class, I've tried QPushButton also) and QGraphicsProxyWidget:
@
class PlotWidget::Impl
{
PlotWidget *that;
public:
QwtPlot *plot;
//QPushButton *button;
QGraphicsProxyWidget *proxy;Impl(PlotWidget *that): that(that), plot(new QwtPlot(0)), //button(new QPushButton(0)), proxy(new QGraphicsProxyWidget(that)) { proxy->setWidget(plot); //proxy->setWidget(button); } ~Impl() { delete proxy; //delete button; delete plot; }};
PlotWidget::PlotWidget(QDeclarativeItem *parent) :
QDeclarativeItem(parent),
impl(new Impl(this))
{
}void PlotWidget::geometryChanged(const QRectF &newGeometry, const QRectF &)
{
qDebug() << newGeometry;
impl->proxy->setGeometry(newGeometry);
}
@My QML code is the folliwing:
@
Rectangle {
width: 640
height: 480
PlotWidget {
id: plot
//anchors.centerIn: parent
x:10
y:10
width: 400
height: 400
}
}
@The problem is the position of the widget. I set it to (10, 10), and it comes to geometryChanged as (10, 10) too, but the widget is located at (20, 20) in the window (I've checked it with a screen ruler). The size of widget is ok - it is 400x400.
Who multiplies position coordinates by 2? How can I make it set real coordinates? -
[quote author="dmcr" date="1338463579"]Well i've read that too fastly......
In fact you don't need to setGeometry for your PlotWidget.
@impl->proxy->setGeometry(newGeometry);@It has to have (0,0) coordinates in the DeclarativeItem which is embedding it.[/quote]
Oh thank you! Now widget positioning works fine!